Context Similarity for Retrieval-Based Imputation

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

Abstract

Completeness as one of the four major dimensions of data quality is a pervasive issue in modern databases. Although data imputation has been studied extensively in the literature, most of the research is focused on inference-based approach. We propose to harness Web tables as an external data source to effectively and efficiently retrieve missing data while taking into account the inherent uncertainty and lack of veracity that they contain. Existing approaches mostly rely on standard retrieval techniques and out-of-the-box matching methods which result in a very low precision, especially when dealing with numerical data. We, therefore, propose a novel data imputation approach by applying numerical context similarity measures which results in a significant increase in the precision of the imputation procedure, by ensuring that the imputed values are of the same domain and magnitude as the local values, thus resulting in an accurate imputation. We use Dresden Web Table Corpus which is comprised of more than 125 million web tables extracted from the Common Crawl as our knowledge source. The comprehensive experimental results demonstrate that the proposed method well outperforms the default out-of-the-box retrieval approach.

Details

Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, ASONAM 2017
EditorsJana Diesner, Elena Ferrari, Guandong Xu
PublisherAssociation for Computing Machinery, Inc
Pages1017-1024
Number of pages8
ISBN (electronic)9781450349932
Publication statusPublished - 31 Jul 2017
Peer-reviewedYes

Publication series

SeriesKnowledge Discovery and Data Mining

Conference

Title9th IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining, ASONAM 2017
Duration31 July - 3 August 2017
CitySydney
CountryAustralia

External IDs

ORCID /0000-0001-8107-2775/work/142253517

Keywords